Corrugating machine construction



Oct. 3, 1939. H. w. BRUKER AL 2,174,555

CORRUG A'EING MACHINE CONSTRUCTION Filed June 18, 1938 INV NTORS W M Y *M ATTORNEYS "me-Moe a, 1939 s PATENT orrics oonnuoa'rmo moms cons'rauo'rron noun w. Bruker and William A. mam, nu

dentown, NHL, assignors to George W. Swift,

Jr. Ina, Bordentown, N. 1., a corporation of New Jersey Application June 18, 1938, Serial No. 214,585

The invention relates to corrugating machines of the type used in the production of corrugated paper, wherein the so-called liner sheet to be corrugated is fed in between a pair of meshing 5 corrugating rolls;'and while passing around with one of said rolls after the corrugatlng stepthe liner is fed past an adhesive-applying roll whichv contacts with and applies sodium silicate or other suitable adhesive to the peaks of the corrugai tions, after which a facing sheet is brought into contact with the above mentioned peaks of the corrugations; In the operation of machines of the above type it-is desirable to provide stripper members operating in 'grooves in the rolls to separate the corrugated paper from one of the corrugating rolls and guide it to travel partially" around with the other corrugatingroll past the point where the adhesive-applying roll applies adhesive to the peaks of the corrugations, as well '20 as to guide the corrugated web to travel further along with the second mentioned corrugating roll after the adhesive-applying operation has been completed.

' The grooved portions of the adhesive-applying 25 roll produce alined spots on the peaks of successive corrugations to which adhesive is not properly applied, thus weakening the product, and to avoid thisobiection it has been proposed (see patent to G. W. Swift, Jr., No. 2,043,635 dated 30 June 9, 1936) to employ shoe-like members acting upon the web after it has passed the adhesive-applying roll to transferor displace some of the previously applied adhesive from adjacent parts of the corrugated web to the above mentioned bare spots.

The present invention aims to provide more complete and uniform application of the adhesive to the peaks of the corrugations while guiding the web adequately in its travel through the 40 corresponding part of the machine as above mentioned, and is particularly advantageous when using adhesives of the starch base type, although also usable with other adhesives. objects and advantages of the invention will be 45 in part obvious and in part specifically referred to in the description hereinafter contained which, taken in conjunction with the accompanying drawings. discloses a preferred appara't'us adapted to operate in accordance with the 50 invention; such disclosure however should be considered merely as illustrative of the invention I and 2. I

Further the main parts of the machine with which the invention is more closely concerned. a

Fig. 2 is in the nature of a plan view'but taken from the position indicated by the dotted lines 2--2 of Fig. '1, looking in the direction of the arrows.

Fig. 3 is a side elevation showing detached a guide member construction adapted to be used in the combination of parts shown in Figs. 1

v 1 I 10 In accordance with the present invention we employ in connection with a grooved adhesiveapplying roll of the character above referred to, 'a second adhesive-applying member or roll positioned to act upon the corrugated web after the 18 latter has passed the first adhesive-applying roll, this second adhesive-applying member not being dependent in its action upon adhesive which has already been applied to the peaks of the corrugations by the first roll and not requiring any dis- 20- placement of already applied adhesive to cover the bare spots, but acting to apply adhesive additionalto' that applied by the first roll and to Y deposit the additional adhesive thus applied upon the bare spots of the web, and also upon which the presentinvention is more directly concerned. 'We have shown in the drawing a pair of 36 meshing corrugating rolls I and 2 whichwill be understood as heated in suitable manner and supported and driven as is known in the art. The liner sheet 2 after passing partially around the first corrugating roll I, passes in between rolls 40 l and 2 where the col-rugating step is performed, and-the corrugated web then passes around with the roll 2 past an adhesive-applying roll 4 supported and driven in suitable manner (not illustrat'ed) and which applies a suitable adhesivefor example a starch base glue or silicate of'soda solution-to the peaks of the corrugations of web 2 as the latter is carried by roll 2 past adheslve-applying roll I. 1

- To separate the corrugated web 2 irom'roll'l so and cause it to be carried around with roll 2, until-and after the adhesive has been-applied, as above mentioned, stripper members 5 may be employed which project into circumferential grooves i in roll I, and also guide members I as which penetrate into grooves 8 in the adhesiveapplying roll 4, and having arcuately shaped guiding surfaces adjacent the periphery of roll 2, to keep the corrugated-web 3 in close engagement with the corrugations of roll 2 until a facing sheet is applied to the sticky peaks of the web'in a manner well known in the art and which accordingly need .not be specifically shown or described herein. For similar reasons the detailed construction of the parts used for supporting the rolls employed and the stripper members and guide members need not be described in detail. 1

Adhesive may be supplied to the adhesive-applying roll 4 from a suitable adhesive supplying member or pot 9 in which a transfer roll l rotates so as to carry adhesive progressively to .the form of a roller which also picks up adhesive from transfer roll I, and which is positioned to act upon the peaks of corrugated web 3 after the latter has passed the above mentioned adhesive-applying roll '4. Adhesive-applying portions of the roller l4 are located'in line with the grooves 8 of roll 4-, and thus as the corrugated web travels past the adhesiveapplying apparatus, spots on the peaks of the ,corrugations which are left bare by roll 4 on account of the grooves l therein, will have additional adhesive deposited by the abovementioned portions of roller H which are in line with grooves 8 and receive their own additional supply of adhesive from pot 9.

In the illustrated form of apparatus the roller I4 is also provided with circumferential grooves l6 located in staggered relation or somewhat out bars I! penetrate into these grooves l6, such I guide members acting in a manner similar to guide member I above described; to hold the corrugated web closely in the corrugations of roll '2 in the region of the adhesive-applying roller l4. As shown in Fig. 3 the guide members I and I! may be connected together in onset relation by the aid of blocks ll. In the operation of apparatus as above described-the spots on the peaks oi'the corrugations which are left bare by the roll 4, are coated with additional adhesive independently supplied by roller l4, without requiring that any adhesive as deposited by roll 4 be removed from other portions of the web for this purpose, and the apparatus operates reliably to insure complete and uniform distribution of the adhesive over the peaks of the web when an adhesive having the physical qualities of starch base glue is used. A construction of the above described character enables thicker guide members and wider grooves in the adhesive-applying rolls to be used without producing spots on the peaks of the corrugated web which are bare of adhesive, so that the guide members are stronger and, longer lived, and hold their shape better and more eflectively hold the corrugated web in proper position. The distribution of the adhesive between the rolls 4 and I4 will depend upon the adjustment of the space between their peripheries and the transfer roll Ill. According to the spacing of rolls 4 and [4 from roll l0 it may result that the adhesive is quite equally distributed between them, or roll l4 may pick up most of the adhesive so that roll 4 receives adhesive only ,at points in line with the grooves of roll l4. The rolls 4 and I4 may be full rolls except for theprovisions of grooves therein wide enough to receive the guide members as shown,

or either or both rolls may have much wider peripheral grooves or gaps therein, so long as the adhesive-applying portions of one roll are positioned to supply adhesive to points in line with the gaps or grooves of the other roll.

While a specific embodiment of the invention has been described it should be understood that changes may be madetherein without departing from the invention in its broader aspects Within the scope of the appended claims.

We claim:

1. A corrugating machine construction having an adhesive applying roll positioned to apply adhesive to the peaks of a corrugated web passing through the machine, said adhesive applying roll having circumferential grooves therein,

' guide members penetrating into said grooves to engage the web adjacent said adhesive applying roll, an adhesive supplying member, and a. second' adhesive applying roll positioned to act on the corrugated web after it has passed said first mentioned adhesive-applying roll, said second mentioned adhesive applying roll being constructed and arranged to apply adhesive additional to that applied by the first mentioned roll and having adhesive applying portions which are in line with the above mentioned circumferential grooves of the first mentioned adhesiveapplying roll.

2. A corrugating machine construction including an adhesive supplying member, an adhesive applying roll positioned to apply adhesive to the peaks of a corrugated web passing through the machine, said adhesive applying roll having circumferential grooves therein, guide members penetrating into said'grooves to engage the web adjacent said adhesive applying roll, said adhesive applying roll being also positioned to receive adhesive from said sipply member, and a second adhesive applying member constructed and arrangedto apply adhesive additional to that applied by said roll, said second adhesive applying 'member being positioned to act upon the web after. it has passed the above mentioned adhesive applying roll, said adhesive applying member having adhesive applying portions which are in line with the above mentionedcircumferential grooves of the adhesive applying roll,

3. A corrugatingmachine having an adhesiveapplying roll positioned to apply adhesive to the peaks of a corrugated web passing through the machine, said adhesive-applying roll having circumferential grooves therein, guide members penetrating into said grooves to engage the web adjacent said adhesive-applying roll, a second adhesive applying roll positioned to act on the corrugated web after it has passed the first mentioned adhesive-applying roll, said second mentioned adhesive-applying roll also having circumferential grooves therein which are located out of line with the circumferential grooves of the first mentioned adhesive-applying roll, and guide members penetrating into said grooves of the second mentioned adhesive-applying roll to engage the adjacent portions oi the web.

4. A corrugating machine having an adhesiveapplying roll positioned to apply adhesive to the peaks of a corrugated web passing through the.

machine, s'aid adhesive-applying r011 having circumferential grooves therein, guide members penetrating into said grooves to engage the web adjacent said adhesive-applying roll, a second adhesive-applying roll positioned to act on the corrugated web alter it has passed the first mentioned adhesive-applying roll, said second mentioned adhesive-applying roii also having circumferential grooves therein which are located out of line with the circumferential grooves of the first mentioned adhesive-applying roll, and guide members penetrating into said grooves of the second mentioned adhesive-applying roll to engage the adjacent portion-of the web. the second mentioned guide. members being positioned in oflset relation to the first mentioned guide members. L

HOBART W. BROKER.

WILLIAM A. HOHMAN. 

